Critical current of dense Bi-2212 round wires as a function of axial strain

被引：39
作者：
Godeke, A. [1 ,2 ]
Hartman, M. H. C. [1 ]
Mentink, M. G. T. [1 ]
Jiang, J. [2 ]
Matras, M. [2 ]
Hellstrom, E. E. [2 ]
Larbalestier, D. C. [2 ]
机构：
[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[2] Florida State Univ, Ctr Appl Superconduct, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2015年 / 28卷 / 03期
基金：
美国国家科学基金会;
关键词：
Bi-2212; overpressure; strain; wire; 30; T; DEPENDENCE;
D O I：
10.1088/0953-2048/28/3/032001
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The critical current (I-c) of dense Bi2Sr2CaCu2O8+x (Bi-2212) round wires with Ag-alloy matrices was measured as a function of axial applied strain (epsilon(a)), to determine whether the I-c(epsilon(a)) behavior is improved in comparison to wires with a large (30-50%) void fraction in the Bi-2212 filaments. Wires were reacted at approximately 890 degrees C under a 1% O-2 in Ar gas mixture at 100 bar pressure to densify the Bi-2212 fraction during the partial melt reaction. After measurement of the I-c at 4.2 K and 5 T at Florida State University, wire sections were sent to Lawrence Berkeley National Laboratory where I-c(epsilon(a)) was measured at 4.2 K at 5 and 15 T using a U-shaped bending spring. We found that I-c(epsilon(a)) has a 0.3% wide linear reversible strain range. An unexpected result is that the width of this reversible range seems comparable to that found for porous samples reacted at only 1 bar, apparently negating an earlier plausible supposition that fuller density samples would be more resilient.
引用
收藏
页数：5
相关论文
共 19 条
[1]  
Bottura L, 2012, REV ACCEL SCI TECH, P25, DOI 10.1142/S1793626812300022
[2]   Reversible effect of strain on transport critical current in Bi2Sr2CaCu2O8+x superconducting wires: a modified descriptive strain model [J].
Cheggour, N. ;
Lu, X. F. ;
Holesinger, T. G. ;
Stauffer, T. C. ;
Jiang, J. ;
Goodrich, L. F. .
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2012, 25 (01)
[3]  
Ekin JackW., 2011, Experimental Techniques for low temperature measurements: Cryostat Design, Material Properties, and Superconductor Critical-Current Testing p41
[4]   Doubled critical current density in Bi-2212 round wires by reduction of the residual bubble density [J].
Jiang, J. ;
Starch, W. L. ;
Hannion, M. ;
Kametani, F. ;
Trociewitz, U. P. ;
Hellstrom, E. E. ;
Larbalestier, D. C. .
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2011, 24 (08)
[5]   Bubble formation within filaments of melt-processed Bi2212 wires and its strongly negative effect on the critical current density [J].
Kametani, F. ;
Shen, T. ;
Jiang, J. ;
Scheuerlein, C. ;
Malagoli, A. ;
Di Michiel, M. ;
Huang, Y. ;
Miao, H. ;
Parrell, J. A. ;
Hellstrom, E. E. ;
Larbalestier, D. C. .
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2011, 24 (07)
[6]  
Larbalestier DC, 2014, NAT MATER, V13, P375, DOI [10.1038/NMAT3887, 10.1038/nmat3887]
[7]   Correlation Between Pressure Dependence of Critical Temperature and the Reversible Strain Effect on the Critical Current and Pinning Force in Bi2Sr2CaCu2O8+x Wires [J].
Lu, X. F. ;
Goodrich, L. F. ;
van der Laan, D. C. ;
Splett, J. D. ;
Cheggour, N. ;
Holesinger, T. G. ;
Baca, F. J. .
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2012, 22 (01)
[8]   Evidence for long range movement of Bi-2212 within the filament bundle on melting and its significant effect on Jc [J].
Malagoli, A. ;
Kametani, F. ;
Jiang, J. ;
Trociewitz, U. P. ;
Hellstrom, E. E. ;
Larbalestier, D. C. .
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2011, 24 (07)
[9]   Superconducting fluctuations and uniaxial-pressure dependence of T-c of a Bi2Sr2CaCu2O8+x single crystal from high-resolution thermal expansion [J].
Meingast, C ;
Junod, A ;
Walker, E .
PHYSICA C, 1996, 272 (1-2) :106-114
[10]   On the roles of Bi2Sr2CuOx intergrowths in Bi2Sr2CaCu2Ox/Ag round wires: c-axis transport and magnetic flux pinning [J].
Naderi, G. ;
Schwartz, J. .
APPLIED PHYSICS LETTERS, 2014, 104 (15)
12